WP Social Blogroll adds a social blogroll to your blog. It will follow and display all updates of the sites in your blogroll.
This plugin works with with version 3.0 of WordPress in single- and multisite-installations. So, yes - it works with WPMU version 3.0 and newer.
No, since version 1.1 of the plugin, this is no longer necessary. The plugin is able to discover the feed-URLs automatically. However, it's still possible and the plugin would use a separatly saved feed-URL.
Yes, they are.
Yes, if you created link-categories, you will be able to group your bookmarks by these categories. On the plugin's option page, you will even be able to order the link-categories customly with drag-and-drop.
It has been tested. It is known to work with the following web browsers:
Microsoft Internet Explorer version 6 and older are unable to display the Feed Reading Blogroll properly.
You can do a couple of things.
For starters, I recommend to save the feed-URLs within your WordPress linkmanager. How to do this is described in my manual.
Furthermore, I recommend to additionally install the following plugins:
Additionally, it may be a good idea to divide your bookmarks into a couple of categories. Afterwards you could add Social Blogrolls for only some of these categories and normal non-social blogrolls for the rest of them.
This idea can pursued even further with help from the plugin Widget Logic. Widget Logic allows you to place sidebar widgets only on certain parts of your blog. For example, you can add a social blogroll only on your homepage and prevent it from being shown on articles and pages.